Compounds of 私書

• 私書
  (n) private document
  personal letter
• 私書函
  (n) (obs) post office box
• 私書箱
  (n) (abbr) post office box
  (P)
• 私書箱番号
  (n) (comp) Post Office box address
  P.O.box address
• 郵便私書箱
  (n) post office box